Station indicator



V. P. GAMBOA STATION INDICATOR Filed Sept 18, 1924 5 Sheets-Sheet 1 uoonfo'v 0260a,

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July 13, 1926.

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Patented July 13, 1926,.

UNITE'DTSTATES VICENTE ERALES GaMBoA, or CHICAGO, ILLINoIs.

STATION INDICATOR.

Application filed September 18, 1924. Serial No. 738,477.

This invention is directed to a station indicator, designed to be automatically actuated in the travel of a train and to visibly indicate the station being approached and at the same time sound'an audible signal to direct attention to the station indication.

The station indicator proper and audible signal. are designed to be operated by air pressure drawn from any suitable source, as for example from the air reservoir of the braking system,with the control of the air pressure governed by train carried elements, adapted to be operated .by appropriately arranged and disposed track sections.

The invention includes an air distributor carried by the train for controlling the air pressure to thestation indicator and signals, 1 a trip element being arranged to actuate the air distributor, and being in turn controlled by the track member. Cooperating with these parts there is provided a regulator which insures of an accurate position of the element, and therefore a proper position of the air distributor, following each track section engagement, to render certain the action of the structure. The invention is illustrated in the accom-' *panying drawings in which Figure 1' is a view in elevation part in section of a passenger coach showing the application of the inventionthereto.

I Figure 2 is a transverse section of the same. i

Figure 3 is a view'in elevation of the track element, with which the trip cooperates; I a

Figure 4 is an end view of the same. Figure 5 is a View in elevation of the movable members of the track element, casing or box therefore being shown in dotted outline. 1 Figure 6 is a similar view showing the movable members depressed as when engaged the train carried trip.

Fi ure 7 is a view in front elevation show-- ing the train carried operating parts including the trip levers, regulator, and air distributor. a FigureS is an end view of'the same.

Figures 9 and 10 are sectional views of the air distributor. therespectively opposite positions thereof being shown. I

Figure 11 is a diagrammatic view illustratin'gthe respective. positions of one. of- D p center of the casing and are pivotally inter connected at 7 and 8. Springs}? are 31.;

the trip levers as moved from normal to 0per'ativeaposition" during; and following zcoop eration with the track member, this figure also showing the relatively corresponding positions of the regulator.

Figure 12 is a diagrammatic view illustrating the operation of the tripping mechanism and the travel of a train past at least two stations, the names of which I appear on the indicator.

Figure 13 is a perspective view of the indicator casing.

Figure 14 is a perspective view of the'indicator complete. a I

Figure 15 is an end view of the mechanism of the indicator proper, the operative parts beingin elevation.

Figure 16 is a similar View taken from the opposite side. Figure 1" K is a perspective view of the tape carryingthe names of'the stations.

Figure 18 is a diagrammatic View illus trating the application of the sign bearing tape, the use of an operating metal tape strip and a curtaintape.

Figure 19 is a perspective view showing the arrangement of the sign bearing tape and of thejmetal tape strip.

Figure 20 is a similar view showing the use of an additional or curtaintape.

Figure 21 is a view in 'front elevation showingthe indicator proper and the corelated signalling means, I

Figure 22 is a side elevation of the same.

The present invention is made up of sev, eral primary parts, as for example the operating sections adapted to be arrangedat appropriate points between the rails of the track; the control, means, which is carried on the coach or coaches of the train and -which is operated through'contact with the operating track sections; an indicator, which is arranged. in the coach conveniently visible to the passengers, and which is actuated byv thecontrol means. The following specification will specifically describe each oi these separate units in the order named.

T rack operating sectons.-The.tracl; operating sections, which are identical throughout the system, includes the casing 1 of appropriate length supported bet-ween the track railson the usualisleepers 2. Pivotally supported at the respective ends 3 and i of the casing .1 are upper and lower arms 5 and '6, which arms extend toward the ranged between the arms adjacent their pivotal connections 7 and S, and bolts are connected to the lower sides of the upper arms 5, both ends of the bolts sliding in rooves 12 formed in a fixture secured in C! the casing 1, with the 'dl ttll to limit the upward movement of the pivotallv coz'inccted ends of the arms 5 under the pressure of the springs 9. The arrangement of the parts is such that in normal position the arms 5 at their pivotal point i extend above the upper surface of the casing l, the upward limit of movement of the end pivots 3 and 4: being detcrmii'ied by the casing, The arms 5 yield under contact with trip levers on the train carried control means, tendin however by reason of the normal inclination of these arms to rock the trip levers, will later appear. The upper wall of the casing l is formed with asiotteil opening of a size to just perinitthe passa, therethrough of the arms 5, the no tion of the casing being formed within the air casing. The pivotal arms in the casing, tend to preclude en 'ance of foreign matter which might interr-re with operation of the arms.

C oniz'voZ mccms.Tl1e control means shown more particularly in Figures 7 to 11, inclusive, includes a frame adapted to be arranged on each coach in which an indica'tor to be positioned. The trail is preferablysecured to usual sill board l t, which supports the fiat spi as in the wheel trucks, a metal plate 1.3 uzu erlyinp the sill board,- and a spacing bloclr'lG hein arranged between the-metal plate and Frame, to insure an accurate spacing of the operating parts of the control means relative to the track operating device. The frame 13 includes spaced hangers in the lower tn d of which rotatably mounted a snat't l7. on the respective ends of which. immediately beyond the hangers are listed the trip levers indicated at 18 and 19. lhese lovers are identical and'comprise sleeve portions 20 secured upon the shaft and diametrically opposed extensions between which, in both directions beyond the sleeves are arranged rollers 212'. The respective trip le crs are arranged at relatively right angles, so that when one is vertical in respect to the frame the other is horizontal thereto, as clearly indicated in Fin. 7. Fixed to one of the hangers is the casing 2 of an air distributor within wnich, and secured upon the shaft 1. is arranged a cutotl 234;. The cutoff is-formed with diametrically opposed wings and the in which the cutoff operates is formed one sidewith three vertically aligned ports 26, 27 and and c the opposite side with a central gle port- Ql). The exterior wall of the casing 23 throughout approximately about mum er of the cutotl, that is the on or shell ill of this portion of the u" 'g, while concentric with the cutoff is larger than the same. The adjacent ends of walls 30 and 31 are connected by wall sections 52, and in iii) the larger portion of the easing there are proviiiled partitions 33 and 3 t in the upper and lower portions of the easarraz-igcd concentric with the cutoff and ionized a radius corresponding to that of ciitoll. These partitions do not extend the joining; vralls of the casing, so .6 is formed within the eating an rimel 35 in open communication ,ort a lower channel 36 in open 1'; with port 28, and a space the partitions 33 in communication with the port 27.

The wings of the cutofi are coextensive circun'iferentially with the lengths of the partitions 3st and of the wall sections 30, the remaining circumference of thocutoli' being materially reduced in diameter. There-tore with the cutoff in the position indicated for example in Figure 9 there is a space provided between the cutotl' and the upper partition 33, as at 38 and a space as 3%) grovided between the reduced wall of the cutoff and the lower wall section 30 of the t' 'lllg. Ports 26 and 27-.are thus in communication while port 28 is in communication aroundthe cutoli' with port 2-9. In the reverse position of the cutoff, as indicated in Figure 10,- ports 27 and are in coinn'iunication around the lower partition 34, while port 26 is placed in connnunication with port 29 around the cutotl' through the channels-in the upper portion of the casing. Thus, in accordance with the respective positions of the cuto'lithe port 27, which is always an inlet portplaced in communication with either the ports :26 or and one or the other ports 26 or 28 is placed in communicationwiththc port 29, which is always an outlet port.

Secured upon the shaft 17, innnediately adjacent the air distributor, is what is termed the regulator. This regulator comprises a hollow cruciform bod ll) adapted to contain an appropriate mass ofmcrcurv, indicated at lL The arms or sections of this body are lined from shaft sol-as to radiateat an angle of to the respective trip levers, so that when a lever is vertical the mercury will be carried in two divergent depending arms of the. body, to insure an exact position of the trip arm, and therefore of the cutoff in: the air distributor. This 11 inn ardl o regulatoris particularly important as when the triparm engages thetrack operating sectionit is swung to a position somewhat less than the required 90, and'in this movement of course causes the mercury to'follow into the arms of the body of the regulator which a re'being turned toward the lowermost position. As the parts are moving, the flow of the mercury tends to maintain the inertia and, in factpossibly carry the parts slightly beyond the 90; As the mercury however will quickly center in the lowermost arms, it is apparent that this regulator will, in effect tend to carry the parts to and maintain them at a full 90 new position.

The regulator is further important in that it permits the use of a less degree of inclination of the arms of the track'operating-(section than necessary to insure a complete movement of the trip lever, as the shifting weight of the regulator will continue the movement of the trip means, and finally bring it to restin the exactly proper position to set the air distributor.

The indicatorr The indicator construe: tion is shown more particularly in Figures 13 to 20 inclusive, and comprises a casing including a base42 arranged for convenient mounting in vposition, and having skeleton side walls 43, held in rigid position by cross bars 44. The casing form is completed by upper and lower walls 45 secured to the skeleton frame, side walls 46,wh'ich are arranged. as hingedly mounted door, to permit access to the interior ofthes'tructure, and a front Wall47, which Wlll be more particularly hereinafter described.

For; operating acylinder 8 is arranged withln theicaslng through securing means &9 this cylinder having pressure P1138350 and entering near the respective ends thereof and'on opposite sides of a piston within the cylinder, the rod 52 of which projects in opposite directions beyond the cylinder,

whereby under air pressure admitted through one or the other of the pipes 'and 51, the piston rod will be moved toward the appropriate wall of the casing. A rack bar '53 is connected by links 54 with the respective ends of the piston rod, and the teeth 55 of this rack bar are adapted to cooperate with teeth 56 of a mutilated gear 57, loosely arranged upon a transverse shaft 58 of the indicator, easing. A ratchet 59 is'k'eyed or otherwise secured upon the shaft 58, 1m-

niediatelyadjacentthe mutilated gear, this ratchet being formed with fourteeth 60 adapted to cooperate with pawl=6l carried bythe mutilated gear, so that'in' the movement ofthe rack in one direction the shaft '58 is advanced substantially'a quarter of a without however; operating the same. The

lower drum 69.

gear 57 is in part formed with teeth 62 adapted to at all times engage pinions 63 arranged in the ends of what will be termed curtain rolls 64 and 65.

Mounted in the casing are upper and lower drum shafts 66 and 67 on each of which is secured adrum for the main indi' cating tape, the upper drum 68 being in vertical alignment with and spaced from the The shaft 58 at'the end opposite the mutilatedgear is provided with a fixed gear 70. Both ends of both shafts 66 and 67 ares uared or of an ular formation.

ing handle-,to thereby permit the initial or correctional setting of the indicating tape and other parts, when the corresponding side door 46 is opened, as may be required by the particular travel of the train. Thus either drum 68 or (SQ-may be positively driven in the operating 'ofthe shaft 58 by the rack bar.

The main indicating tape is shown at Telin Figure 17, and this tape which'is preferably of a non-extensible cloth, paper or the like, is marked on both sides, by printing or otherwise, with the namesof the stations for which the particular indicator a is designed. One end of this tape 'issecured to the drum 67, rolled about the same,-passed over a guide roller? 5 iminediatelyinrear of the face, of the casing in substantial alignment withthe upper plane of theroll, then downwardly, in parallelism with the face of the casing'over a lower'guide roll 76, then over the roll 67,-passing aroundythesame from beneath, then around the lower guide roll 77 of an upper set of guide rolls,v then upwardly in parallelism with the face of the casing, over the upper guide roll 78 of the set, and terminally secured to the drum 66. This arrangement presents two flat displa'y'sections 7 9 and 80 of the tape,'t hese two display sections, by

reason of the particular winding of the tape presenting opposite faces of the tape. The names of the stations are increasingly distanced each from the other on the indieating tape.-"counting from the enrolling drum, in order to balance or counteract the increasing circumference of thesame drum. Also the particular arrangement of these names on the tape, in'jconjunction with the particular windingarrangement of the same,

will cause the names of the same terminal.-

stationfor starting point of the train, to be displayed in both flat sections "when the I tape is fully wound O en m a show ln-Flaia t i The ends of the drums, beyond the indicating, tape form project-ions 8ljto receive a narrow operating bandBQ-preferablyfi steel, wound about the respective drums to insure positive movement or one being properly communicated tothe other, to compel winding of the indicatoncasing, This re-' lieves the indicating tape otthe strain of such drum operation,;it being apparent however that the respective tapes orbands 7d and 82 must be the same thickness.

A curtain tape 83 is secured to one of the curtain rolls 6d passed over guide rolls S4: and terminally secured to the othergcurtain roll 65, the curtain tape being wound about one of the-rolls sufficiently to permit desired movement. The guide rolls 85tcause the curt-ain tape to follow the outline of the casing, this curtain tape passing downwardly at the face portion of the casing, in front of the display sections 79 and of the indicating tape. The curtai-ntape throughout that portion overlying the displaysections ot the indicating tape'is cutout to. form an opening therein, ofa size to permit visibility of the displaysections of the indicatingtape in all positions of the curtain tape so tar as the opening is concerned. The margins 86 of the curtain tape formed by the opening are provided with upper and lower sets of connecting elements 87 whereby by-a sign strip 88, carrying cooperating connecting elements 89 may be removably secured to the curtain tape. It will beapparent that each time the mutilated gear 57 is operated by the rack, the curtain tape will be come spondingly operated, and as the gear is reciprocated by the rack, the curtain tape will be moved back and forth relative to the display sections of the indicating tape. This will cause the sign strip, bearing for example'the sign. Shown here to he alternately positioned over the respective display sections of the indicating tape, for purpose which will later appearr A metalic sign section, suitably inscribed, as for example the words Next station, is shown at 90 suitably mounted in guides formed in the casing and arranged ,on the front or" the glass face which overlies the display sections of the indicating tape. The sign section 90 is substantially. comn'iensurate with the side of the display section of the indicating tape, and may be manually moved to cover either suchdisplay section and held in such position by set screws 91.

The face ofthe indicator is illuminated from the light source 92 arranged at the lower end of the bracket 93, and-provided with. deflectors to direct the light directly onto the face o't'the indicator casing. The bracket-93 isformed with a ,bOX-llkQSGCtlOIl 9% adapted to hold an audible alarm, here shown as an ordinary mouth organ 95. l The pressure pipe 96 leads through the bracket and terminates in rear of the mouth organ in a transverse pipe 97,. perforated to direct streams of air into. the. mouth organ for sounding the same.

Opemrz'on.lt is of course to, be understood that as indicated in Figure 12 the track operating sections are to be arranged between the rails of therailroad track, in both directions beyond and at appropriate, distances from the stationot the, indicator. These track operating sections are disposed relatively opposite, so that theone engaged as the train is approaching thev stationwvill operate for example the trip leverlS while the one beyond the station will operate the trip lever l9. It is also to he understood that the port 27 of the air distributor is in open communication witha source of air pressure on the train, asior example the air reservoir of the brake system; while the ports 26 and 28 are in, communication with the cylinder d8 of the, indicator through the pipes 50 and 51; and the outlet port 29 in conn-nunication through the pipe 96 with. the audible alarm. It will also be assumedthat the curtain sign strip .88 will be arranged to cover one of the display sections of the indicating tape while the metal sign section 90 will be arranged -to,,cover the other of such displayscctions. The indicator casing face then, presents the signs Next station, shown here. As the train reaches the track operating section in, advance of the particular station, the trip lever 18 is moved from its vertical position towards its horizontal. position, the regulator completing the movement until ,the trip lever 18 is finally held in horizontal position, but thetrip lever 19 is correspondingly.held in vertical'position. In this movement of the trip levers the cut 01? of the air distributor is operated and the latter moved to the position, for example as that shown in Figure 9. Air pressure is thus admitted to. the cylinder 18 of the indicator and the rack bar moved downwardly moving the mutilated gear and also the shaft 58 through the pawl and ratchet mechanism. This moves the indicating tape to display the nameot a station on that display section underlying the curtain sign strip 88, and as the mutilated. gear is in cooperation with the. curtain tape rolls 6d and 65 the curtain tape is moved so that the sign strip 88thereoi is moved away from the particular display section, rendering visible the name of the station. As the metallic sign strip remains in place the :tace of the indicator now reads for example Next station, McCook. Asthe train leave-sthe station the remaining trip lever, 19, engages the other. track operating section, the regulator again completing the movement, moving the initially, operated lever to the vertical position, and the trip lever 19 toxthehorizontal position, The-cutofl is shifted to theposition indicated in Figure '10, whereupon air is admitted in the reverse direction to the cylinder 48 of the indicator, and therack bar is moved upwardly. This operates the mutilated gear, but not the shaft 58, moving the mutilated gear merely setting the pawl 61 for the succeeding operation with the teeth of the ratchet 59. This operation of the mutilated gear however actuates the curtain tape 83 in the reverse direction, again moving the sign strip 88 carried thereby to ward and disposing the same over the station indication of the indicating tape. Thus as the train leaves the station the face of the indicator again reads Next station, shown here. This operationis repeated for the succeeding stations throughout the limit of travel for which the indicator is arranged. When the trainis arriving at a terminal city, and the indicator is to be positioned for the return trip, if the passenger coaches bearing the indicator are not turned but merely travel in the reverse direction,- the brakeman will shift the gear 73 to the shaft of the other drum after having manually operated the drum by. suitable crank to move the indicator tape to show at the proper display section the name of the next station in the line of travel. When the travel of the train is reversed at the terminus, the brakeman having set the .indicator by moving the gear 73 to the other drum, shifted the sign strip 88 to the remaining connec-- tors as 87 and also shifted the'sign section 90 to the opposite indicator display section, the indicator tape will properly display the names of the stations at the exposed display section during the return trip. Of

, course under these conditions the curtain tape sign strip cooperates with the display section opposed to that to which it cooperated on the first run ofthe train, as will be obvious. r, I y

In each positive operation of the piston Within thecylinder. 48, :the air admitted therefromin a previous operationis forced through the connecting pipe and distributor, the cut ott bein'g arranged so that in either position this out going air under pressure is directed through port 29, and thence through the pipe 96 to sound the moutlrorgan, calling attentiontothe operation of the indicator." It will'be of course apparent that but little "pressure -was necessary to operate the parts of "the indicator, and that the quantity of air required is very small,

hence the pipes of thesystemneed have but small bores, though it is necessary that these pipes begformed 'in part'i 'of flexible sections by step movement to the tapejwhen approaching a station, and means operated by track sections to cover theexposed por tion of the tape when leaving a station.

3. A station indicator having a marked indicating tape, means controlled by track sections to impart a step by step movement to the tape whenapproaching a station, and a curtain tape operated by said means to cover the exposed portion of the indicating tape when leaving a station.

a. A- station indicator having a marked indicating tape, an air distributor for con trolling air pressure to impart a step by step movement to such tape in approaching astation to display a portion of said tape, acurtain tape controlled'by the air distributor to alternately cover and expose the display portion of the indicating tape, and track operating sections to actuatethe air distributor. I

. 5. A station indicator operating means including a cylinder, a piston therein, a piston rod extending in both directions beyond the cylinder, operating elements actuated in the movements of said rod, an air distributor for admitting air on oppositesides of the piston, trip levers for actuating the air distributor, and independent track sections for operating the trip levers; a e

6. A station indicator operating means ineluding a cylinder, a piston therein, a piston rod extendinginboth directions beyond the cylinder, operating elements actuated in the movements of said rod, an air distributorfor admitting air on opposite sides of the piston, trip levers for actuating the air distributor, and independent track sections for operating'gthe trip levers, and an audible alarm controlled by the air distributor.

7. An operating means for station indicators, including a cylinder, a piston therein, air pressure admission to the cylinder on opposite sides of the piston, the piston rod extending in .both directions beyond the'cyh inder, an indicating tape, a curtain tape,

and means for operating the indicating tape through a stepby step movement in the operation of thepiston rod 'in one direction, said means operating the curtain tape, in rel ativelv reverse direction during movement of the piston rod in both directions.

8. An operating means for station indif cators, including'a'cylinder, a'piston there.- in, air pressure admission to the cylinder on opposite sides of the piston, the piston rod extending in bot-hdirections beyond the cylind'er, an indicating tape, a curtain tape, and n'ieans for operating the indicating tape in certain movements of the piston rod and for operating the curtain tape i all movements of the piston rod.

9. An operating means for station indicators, including a cylinder, a piston therein, air pressure admission to the cylinder on opposite sides of the piston, the piston rod extending in both directions be :nd thc cylinder, an indicating tape, a curtain taoe, and means tor operatii the indi cat ng tape in certain movements of the piston rod and tor operating the curtain tape in allmovenients of the piston rod, and an air di ibutor "for controlling the air under pressure to the cylinder.

10. in operating means "for station indicators, including a cylinder, :1 .1 iston therein, airpressure' admission to the cylinder on opposite sides ol the piston, the piston rod e:;- tending in both directions beyond the cylinder, an indicating tape, a-curt-ain'tape, and means l'or operating the indicating tape in certain movements of the piston rod and for operating the curtain tape in all movements of the piston rod, an air distributor receiving air under pressure and delivering it to the respective ends of the cylinder in succession, and track sections for controlling the position of the air distributor.

11. An operating means for station indicators, including a cylinder, a piston therein, air pressure admission to the cylinder on opposite sides of the piston, the piston rod extending in both directions beyond the oyl inder, an-indicating tape, a curtain tape, and means for operating the indicating tape in certain movement of the piston rod and for operating the curtain tape'in all movements of the piston rod, and track operating sections for controlling the admission of air to the respective ends of the cylinder.

12. An operating means for station indicators, including a cylinder, a piston therein, air pressure admission to the cylinder on opposite sides of the piston, the piston rod extending in both directions beyond the cylinder, an indicating tape, a curtain tape, and means for operating the indicating tape in certain movements of the piston rod and for operating the curtain tape in all movements of the piston rod, an audible alarm, and an air distributor controlling the admission of air to the cylinder and to the audible alarm.

13. A station indicating operating means, including a cylinder, a piston therein responsive to air pressure, a rack bar operated by the piston, a gear ivheel operated by the rack bar, an operating shaft, an indicating tape actuating in the movement of such shaft, means whereby the. gear Wheel operates the shaft in movement of such gear Wheel in one direction and does-n'otatlect the shaft .in movement of the gear Wheel in opposite curtain tape in all movements of the fluid pressure means.

15. A station indicator having a marked indicating tape, a sign strip normally covering the display position of such indicating tape. and means operated by track instrumentalities to simultaneously shift the sign strip to expose the marked indicating tape and move the indicating tape toa new display position.

16. A station indicator having-a marked indicating tape, a sign strip normally covering the display. position of such indicating tape, means operated by track instrumentaln ties to simultaneously shift the sign strip expose the marked indicating tape and more the indicating tape to a new display position, and means operated bysucceeding instrumentalities to return the sign strip to a position to cover the display portion of the indicating tape.

17. A station indicator, comprising an indicating tape, means for advancing said tape in a step by step movement, a sign strip adapted to cover that portion of the indicating tape-arranged for display, and mechanism operated through track instrumentalit-ies to first-advance the indicating tape for a new display position, move the sign strip to expose the indicating tape, and return the sign strip to cover the indicating tape.

18. A station indicator, comprising an indicating tape, means for advancing said tape in a step by step movement, a sign strip adapted to cover that. portion of the indicating tape arranged for display, and mechanism operated through track instrumentalities to first advance the indicating tape for a new display position,'m'ove the sign strip to expose the indicating tape, and returnthe-sign strip to cover the indicating tape, the movement of said mechanism to return the signstrip-to cover the indicating tape being Without-effect on the inclicating tape.

19. A- stationindicatorcomprising a plurality-of spaced drumsyan indicating tape terminally WOHIICl about the drums, means for operating the drums to feed the tape, a sign strip movable to and fr'om a position to cover the display ,portion' of the tape, annember-adapted for reciprocation,

and means for causing both movements in reciprocation of said member to be translfl 1 I initted to the sign strip, said means being arranged to cause one of said movements only of said the drums.

20. A station'indicator comprising a plurality of spaced drums, an indicating tape terminally Wound about the drums, means for operating the drums to feed the tape, a sign strip movable to and from a position to cover the display portion of the tape, a member-adapted for reciprocation, means for causing both movements in reciprocation of said member to be transmitted to the sign strip, said means being arranged to cause one of said movements only of said member to be transmitted to the drums, and means responsive to" air pressure for controlling the reciprocation of said member. i

21. A station indicator comprising a plurality of spaced drums, an indicating tape terminally Wound about the drums, means for operating the drums to feed the tape, a sign strip movable to and from a position' to cover the display portion of the tape, a member adapted for reciprocation, means for causing both movements in reciprocation of said member to be transmitted to the sign strip, said means being arranged to cause one of said movements only of said member to be transmitted to the drums, means responsive to air pressure member to be transmitted to for controlling the reciprocation of said member, and means governed by, track instrumentalities for controlling the air presposed area of the indicating tape, said sign section being movable to permlt exposure of different sections of the indicating tape. 23. A station indicator comprising a casmg having a display opening, a marked indicating tapetravelling across said opening, a sign strip movable in the opening to restrict a predetermined portion thereof for the display of the indicating tapeand a curtain tape movable alternately from a position to cover the exposed area of the indicating tape to a position in rear of the sign strip. j

A station indicator comprising a casing having a display opening, a marked indicating tape travelling across said opening, a sign strip-manually movable in the opening to restrict a predetermined portion thereof for the display'of the indicating tape, and a curtain tape movable alternately from a position to cover the exposed area of the indicating tape to a position in'rear of the sign strip. g

In testimony whereof I afiix my signature.

VICENTE PERALES GAMBOA. 

